AFE1103

® AFE 110 3 AFE1103 HDSL/MDSL ANALOG FRONT END FEATURES q COMPLETE ANALOG INTERFACE q T1, E1, AND MDSL OPERATION q CLOCK SCALEABLE SPEED q SINGLE CHIP SOLUTION q +5V ONLY (5V OR 3.3V DIGITAL) q 250mW POWER DISSIPATION q 48-PIN SSOP q –40°C TO +85°C OPERATION q SECOND SOURCED BY BROOKTREE Bt8921 DESCRIPTION Burr-Brown’s Analog Front End greatly reduces the size and cost of an HDSL or MDSL system by providing all of the active analog circuitry needed to connect the Brooktree Bt8952 HDSL digital signal processor to an external compromise hybrid and a 1:2 HDSL line transformer. All internal filter responses as well as the pulse former output scale with clock frequency— allowing the AFE1103 to operate over a range of bit rates from 196kbps to 1.168Mbps. Functionally, this unit is separated into a transmit and a receive section. The transmit section generates, filters, and buffers outgoing 2B1Q data. The receive section filters and digitizes the symbol data received on the telephone line and passes it to the Bt8952. The HDSL Analog Interface is a monolithic device fabricated on 0.6µCMOS. It operates on a single +5V supply. It is housed in a 48-pin SSOP package. This unit is second sourced by Brooktree’s Bt8921. Pulse Former Line Driver txLINEP txLINEN PLLOUT PLLIN txDATP txDATN txCLK rxSYNC rxLOOP 2 rxGAIN Delta-Sigma Modulator 14 rxD13 - rxD0 Decimation Filter Receive Control Transmit Control Voltage Reference REFP VCM REFN rxLINEP rxLINEN rxHYBP rxHYBN Patents Pending ...